![]() For a queue, you use a First-In/First-Out (FIFO) approach. Queues and stacks differ only in the way elements are retrieved. They’re also useful for much more complex tasks, such as lifecycle management for an operating system application. They can be used to implement ( spoiler alert!) queues or stacks as well as graphs. Linked lists serve a variety of purposes in the real world. Now that you know how a linked list is structured, you’re ready to look at some practical use cases for it. The last node must have its next reference pointing to None to determine the end of the list. The first node is called the head, and it’s used as the starting point for any iteration through the list. Here’s what a typical node looks like: NodeĪ linked list is a collection of nodes. Next contains a reference to the next node on the list.Data contains the value to be stored in the node.Each element of a linked list is called a node, and every node has two different fields: Before going more in depth on what linked lists are and how you can use them, you should first learn how they are structured. ![]()
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